Jann Horn discovered that CUPS permitted HTTP requests with the Host header set to "localhost.localdomain" from the loopback interface. If a user were tricked in to opening a specially crafted website in their web browser, an attacker could potentially exploit this to obtain sensitive information or control printers, via a DNS rebinding attack. (CVE-2017-18190)
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"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3577-1.json"
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"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3577-1.json"
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